CVE-2019-12525
Scores
EPSS
Percentile: 55.2%
CVSS
CVSS Score: 4.3/10
All CVSS Scores
Vector: CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Adjacent Network (A)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Privileges Required
None (N)
Describes the level of privileges an attacker must possess
User Interaction
None (N)
Captures the requirement for a human user participation
Scope
Unchanged (U)
Determines if a successful attack impacts components beyond the vulnerable component
Confidentiality Impact
None (N)
Measures the impact to the confidentiality of information
Integrity Impact
None (N)
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
Low (L)
Measures the impact to the availability of the impacted component
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Vector Breakdown
CVSS (Common Vulnerability Scoring System) vector provides detailed metrics about vulnerability characteristics
CVSS
Attack Vector
Network (N)
Describes how the vulnerability is exploited
Attack Complexity
Low (L)
Describes the conditions beyond the attacker's control
Authentication
None (N)
Describes the level of privileges an attacker must possess
Confidentiality Impact
Partial
Measures the impact to the confidentiality of information
Integrity Impact
Partial
Measures the impact to integrity of a successfully exploited vulnerability
Availability Impact
Partial
Measures the impact to the availability of the impacted component
Description
An issue was discovered in Squid 3.3.9 through 3.5.28 and 4.x through 4.7. When Squid is configured to use Digest authentication, it parses the header Proxy-Authorization. It searches for certain tokens such as domain, uri, and qop. Squid checks if this token’s value starts with a quote and ends with one. If so, it performs a memcpy of its length minus 2. Squid never checks whether the value is just a single quote (which would satisfy its requirements), leading to a memcpy of its length minus 1.
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Sources
CWEs
Related Vulnerabilities
Vulnerable Software (16)
Type: Configuration
Product: squid
Operating System: debian
{ "fixed": "4.8-1"}
Source: debian
Type: Configuration
Product: squid
Operating System: ubuntu cosmic 18.10
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: squid
Operating System: ubuntu disco 19.04
{ "fixed": "4.4-1ubuntu2.2"}
Source: ubuntu
Type: Configuration
Product: squid
Operating System: ubuntu trusty 14.04
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: squid
Operating System: rhel 7
{ "fixed": "3.5.20-15.el7_8.1"}
Source: redhat
Type: Configuration
Product: squid
Operating System: rhel
{ "fixed": "4-8020020200430095908.4cda2c84"}
Source: redhat
Type: Configuration
Product: squid3
Operating System: astra 1.6.8
{ "unaffected": true}
Source: astra
Type: Configuration
Product: squid3
Operating System: debian
{ "unfixed": true}
Source: debian
Type: Configuration
Product: squid3
Operating System: ubuntu bionic 18.04
{ "fixed": "3.5.27-1ubuntu1.3"}
Source: ubuntu
Type: Configuration
Product: squid3
Operating System: ubuntu trusty 14.04
{ "unfixed": true}
Source: ubuntu
Type: Configuration
Product: squid3
Operating System: ubuntu xenial 16.04
{ "fixed": "3.5.12-1ubuntu7.8"}
Source: ubuntu
Type: Configuration
Vendor: *
Product: debian_linux
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*",...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:debian:debian_linux:10.0:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": "OR"}
Source: nvd
Type: Configuration
Vendor: *
Product: fedora
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:o:fedoraproject:fedora:29:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": "OR"}
Source: nvd
Type: Configuration
Vendor: *
Product: leap
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*", "vu...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:o:opensuse:leap:15.0:*:*:*:*:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": "OR"}
Source: nvd
Type: Configuration
Vendor: *
Product: squid
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*", "versionEndIncluding": "3.5.28", "versionStartIncluding": "3.3.9", "vulnerable": true },...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*", "versionEndIncluding": "3.5.28", "versionStartIncluding": "3.3.9", "vulnerable": true }, { "cpe23uri": "cpe:2.3:a:squid-cache:squid:*:*:*:*:*:*:*:*", "versionEndIncluding": "4.7", "versionStartIncluding": "4.0", "vulnerable": true } ], "operator": "OR"}
Source: nvd
Type: Configuration
Vendor: *
Product: ubuntu_linux
Operating System: * * *
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*...
{ "cpe_match": [ { "cpe23uri": "cpe:2.3:o:canonical:ubuntu_linux:12.04:*:*:*:-:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:esm:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "vulnerable": true }, { "cpe23uri": "cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*", "vulnerable": true } ], "operator": "OR"}
Source: nvd